11.   Homer Simpson slavering at the thought of eating the box of old taco shells that had been sitting for years in an air duct of his nuclear power plant.

12.   Inspect all seams in the air ducts for leaks.

13.   It has soft, rounded lines, and the monitor has a Swiss-cheese cutout design in place of the traditional slotted air ducts.

14.   It took about a second, another few minutes for the system to blow out that musty smell from the dormant air ducts.

15.   Jerry-built air ducts make up for the broken fans.

16.   Leitenberg said an underground laboratory might still be functioning there, detectable by ground-level air ducts camouflaged by a small shed.

17.   Make sure the heating and air ducts are properly installed.

18.   Outmoded air conditioning and heating systems meant quiet moments in symphonies or plays were frequently interrupted by belching noises from air ducts.

19.   Raised ceilings with exposed wires, air ducts and cables are in.

20.   Sealing your air ducts with mastic is inexpensive and not difficult, and can bring great benefits.